WIP: backface visibility plumbing (not for review)

third_party/WebKit/Source/platform/testing/PaintPrinters.cpp

Index: third_party/WebKit/Source/platform/testing/PaintPrinters.cpp
diff --git a/third_party/WebKit/Source/platform/testing/PaintPrinters.cpp b/third_party/WebKit/Source/platform/testing/PaintPrinters.cpp
index 259d82febd6aa3de93b6cdd4191bd7b0429ff0c5..abd63837c086ebcba29cc8e762556c7b738960c6 100644
--- a/third_party/WebKit/Source/platform/testing/PaintPrinters.cpp
+++ b/third_party/WebKit/Source/platform/testing/PaintPrinters.cpp
@@ -55,10 +55,33 @@ void PrintTo(const PaintChunk& chunk, std::ostream* os)
 void PrintTo(const PaintChunkProperties& properties, std::ostream* os)
 {
     *os << "PaintChunkProperties(";
+    bool printedProperty = false;
     if (properties.transform) {
         *os << "transform=";
         PrintTo(*properties.transform, os);
+        printedProperty = true;
     }
+
+    if (properties.clip) {
+        if (printedProperty)
+            *os << ", ";
+        *os << "clip=";
+        PrintTo(*properties.clip, os);
+        printedProperty = true;
+    }
+
+    if (properties.effect) {
+        if (printedProperty)
+            *os << ", ";
+        *os << "effect=";
+        PrintTo(*properties.effect, os);
+        printedProperty = true;
+    }
+
+    if (printedProperty)
+        *os << ", ";
+    *os << "backfaceHidden=" << properties.backfaceHidden;
+
     *os << ")";
 }